Microbial Response to Varying Concentrations of Crude Oil Pollution of Agricultural Soils in Ondo State, Nigeria

Felix Ikuesan
2018 Microbiology Research Journal International  
This research investigated the effects of varying concentrations of crude oil on the population of crude oil degrading microorganisms in crude oil polluted agricultural soils from Igodan-Lisa, Oba-Ile and Ido-Ani areas of Ondo State, Nigeria. The soil samples were exposed to 1-4% (w/w) crude oil and analyzed monthly for six periods using standard microbiological techniques for the cultivation and enumeration of crude oil degrading bacteria and fungi. Results indicated that the crude oil
more » ... g microbial populations were significantly altered. The population of crude oil degrading microbes were higher (1.03 x 10 5 -1.10 x 10 6 cfu/g for bacteria and 1.07 x 10 4 -8.67 x 10 5 sfu/g for fungi) in polluted than unpolluted (1.53 x 10 4 -9.40 x 10 5 cfu/g for bacteria and 1.17 x 10 3 -5.17 x 10 5 sfu/g for fungi) soils and also varied with increase in the amount of crude oil spilled and time. The mean count indicated that the microbiological status of the soil samples were not negatively impacted at 1-4% crude oil contamination and the effect on soil micro flora is a function of both concentration and contact time.
doi:10.9734/mrji/2017/38053 fatcat:ajvgpzbjarcgbm3rzqtj5ui4om